# https://leetcode.com/problems/crawler-log-folder
from typing import List

class Solution:
    def minOperations(self, logs: List[str]) -> int:
        ret = 0
        for dir in logs:
            if dir == "./":
                continue
            elif dir == "../":
                ret += -1 if ret > 0 else 0
            else:
                ret += 1
        return ret